Growth of scale for juvenile chinook salmon in the Bolshaya River (West Kamchatka)

Abstract

Scale structure is investigated for juvenile chinook salmon caught in the lower part of the Bolshaya River (West Kamchatka) in 2007-2013. Sclerites are formed in late May - late September for underyearlings (on average 9.34 days for a scleritis) and in late May - middle July for the fish of age 1+ (on average 12.76 days for a scleritis). After wintering, the scale seasonal growth resumes and an annual ring is formed usually on May 15-20.

Keywords

• тихоокеанские лососи
• чавыча
• возраст
• склериты
• пресноводный период
• длина тела